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Posted to common-issues@hadoop.apache.org by "Elek, Marton (JIRA)" <ji...@apache.org> on 2019/05/30 07:46:00 UTC
[jira] [Resolved] (HADOOP-16312) Remove dumb-init from
hadoop-runner image
[ https://issues.apache.org/jira/browse/HADOOP-16312?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Elek, Marton resolved HADOOP-16312.
-----------------------------------
Resolution: Won't Fix
Thanks [~eyang]. As we concluded that we don't need to remove dumb-init I am closing this issue and created HADOOP-16338 to use exec instead of the default fork.
> Remove dumb-init from hadoop-runner image
> -----------------------------------------
>
> Key: HADOOP-16312
> URL: https://issues.apache.org/jira/browse/HADOOP-16312
> Project: Hadoop Common
> Issue Type: Improvement
> Reporter: Elek, Marton
> Priority: Major
>
> This issue is reported by [~eyang] in HDDS-1495.
> I think it's better to discuss under a separated issue as it's unrelated to HDDS-1495.
> The original problem description from [~eyang]
> {quote}Dumb-init is one way to always run contaized program in the background and respawn the program when program fails. This is poor man’s solution for keeping program alive.
> Cluster management software like Kubernetes or YARN have additional policy and logic to start the same docker container on a different node. Therefore, Dumb-init is not recommended for future Hadoop daemons instead allow cluster management software to make decision where to start the container. Dumb-init for demonize docker container will be removed, and change to use entrypoint.sh Docker provides -d flag to demonize foreground process. Most of the management system built on top of Docker, (ie. Kitematic, Apache YARN, and Kubernetes) integrates with Docker container at foreground to aggregate stdout and stderr output of the containerized program.
> {quote}
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